Finding the Third Proportional to 3,940,649 and 8,489,202

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,649 : 8,489,202 = 8,489,202 : x
2. Step 2: Convert to fraction form
   3,940,649/8,489,202 = 8,489,202/x
3. Step 3: Cross multiply
   3,940,649x = 8,489,202 × 8,489,202
4. Step 4: Simplify right side
   3,940,649x = 72,066,550,596,804
5. Step 5: Solve for x
   x = 72,066,550,596,804/3,940,649
6. Step 6: Final answer
   x = 18,287,990.28